最初から入ってるctagsは「-R」が使えない（Exuberant Ctagsじゃない）

mac ctags vim

MacPortsでExuberant Ctagを入れること

# /usr/bin/ctags --help
/usr/bin/ctags: illegal option -- -
usage: ctags [-BFadtuwvx] [-f tagsfile] file ...
# 
# /usr/local/bin/ctags --version
Exuberant Ctags 5.7J1, Copyright (C) 1996-2007 Darren Hiebert
  Compiled: Jun  1 2008, 22:25:30
  Addresses: <dhiebert@users.sourceforge.net>, http://ctags.sourceforge.net
  Japanese patch  by Hirohito Higashi <h_east@pop11.odn.ne.jp>
                     http://hp.vector.co.jp/authors/VA025040/
  Optional compiled features: +wildcards, +regex, +kanji